add awscrt

[ocefpaf]

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[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/awscrt) and found it was in an excellent condition.

[ocefpaf]

    --- Building dependency: aws-lc (RelWithDebInfo) ---
    /home/conda/staged-recipes/build_artifacts/awscrt_1619035367907/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/bin/cmake -DCMAKE_PREFIX_PATH=/tmp/pip-req-build-5jfjgulx/build/deps/install -DCMAKE_INSTALL_PREFIX=/tmp/pip-req-build-5jfjgulx/build/deps/install -DBUILD_SHARED_LIBS=OFF -DCMAKE_BUILD_TYPE=RelWithDebInfo -DBUILD_TESTING=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DBUILD_LIBSSL=OFF /tmp/pip-req-build-5jfjgulx/crt/aws-lc
    CMake Error at CMakeLists.txt:39 (message):
      GCC 9.3.0 is not supported.

😒

[chrisburr]

Apparently this is intentional to ban this version: https://github.com/awslabs/aws-lc/blob/129fc373c971f6ac275a1ed5de2b96410d9cc9d9/CMakeLists.txt#L31-L42

It should still be possible to use GCC 7 using a conda_build_config.yaml.

[ocefpaf]

Apparently this is intentional to ban this version: https://github.com/awslabs/aws-lc/blob/129fc373c971f6ac275a1ed5de2b96410d9cc9d9/CMakeLists.txt#L31-L42

It should still be possible to use GCC 7 using a conda_build_config.yaml.

Do you know the right syntax for it? I tried:

ctng_gcc:
  - 7.5.0

but it didn't work.

[xhochy]

@ocefpaf Welcome to the world of aws-c-* packages 😍 I will dig a bit into this as it is probably better to use the C(++) packages from conda-forge instead of the bundled sources. For the referenced error, I would suggest a different fix: Find out how to build it without aws-lc. That is AWS' own OpenSSL fork, you should be able to build instead without aws-lc normally and use our openssl package.

[xhochy]

Made a PR to your fork: ocefpaf#6 but that depends on #15187 which I can fix tomorrow. It worked fine on osx-arm64 for me :)

[ocefpaf]

Thanks @xhochy!

[xhochy]

Depends on conda-forge/aws-c-mqtt-feedstock#8

[xhochy]

@conda-forge/staged-recipes With the latest build of aws-c-mqtt this is now ready for review/merge.

[ocefpaf]

@xhochy and @chrisburr thanks so much for the help here. I had no idea what I was getting into 😄